It can also be used to view and clear metadata, as well as set permissions and protect PDF documents. UnityPDF has a very simple and quick merging PDF files feature. You just have to drag and drop one or more PDF files you want to merge, reorder them then generate your final PDF file in one click and just a few seconds.

You can split every PDF files to several one page new PDF files. For each PDF file in the list, UnityPDF will generate "file1_page1.pdf, file1_page2.pdf, file1_page3, etc."